I dont know specifically about the TST1 package from tSc but I can vouch for their in-ceiling and outdoor speakers. There is a good review on the mid level floor standing on the AH homepage. I think the overall jist was they sound as good as speakers double their price and can be improved easily by some extra bracing and some more foam.
If you like DIY, there are some amazing plans out there. Check out MissionAccomplished and the Parts Express DIY showcase.